Before starting, this guide requires Homebrew, which you can install from here: https://brew.sh Open Terminal, and paste in the following. It will take a while to build, but you should be able to get it all done in one fell swoop: cd git clone https://github.com/Wilba6582/qmk_firmware.git cd qmk_firmware git branch zeal60 cd keyboards/zeal60 git submodule update …